This stand is about 1/3 the cost of the Lee Stand, a little shorter (32") though, but should work.
https://www.harborfreight.com/universal-bench-grinder-stand-3184.html
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In thinking about this, you need to start with the fact that the manuals, calipers, primers, notebook, pen, powder... in short everything on the loading bench can be completely supported by the
flimsiest thrift store card table you can find. Everything that is but the press.
The press is the ONLY item that requires a substantial bench. So in that sense, the grinder stand
Tilos presented has great merit.
Analysis of the forces at work (straight down for sizing, straight up for priming) comprise about 80-85% of what needs to be resisted. The very low side-to-side forces can be ably resisted by simply securing to the studs in the wall behind, which we would advise even with a permanent, custom built bench.
So the simplest bench to construct is also the simplest bench to deconstruct (e.g.
move), and consists purely of a single post and an ~18w x14d" top. It might look like this...
I suggest a 6x6 as the monopod. That would allow substantial resistance to compression forces and the weight offers all the resistance required for up-stroke priming. The top only needs to be wide enough to span two studs within the wall, which are usually on 16" centers. A 1x1 metal angle allows the top to affix securely to the wall.
Furthermore, I suggest bolting this to the rear wall of a
closet. First, because you can lock a closet and keep inquisitive kids away and safe. Secondly, because a landlord is never going to inspect a closet wall when it comes time to get the deposit refunded.
Not only is this very effective and straightforward, but these are the type materials which can be found for free in any construction dumpster. Additionally, it lends itself to a lot of customization as your dumpster-diving career turns up finished counter tops and other goodies.
Hope this stimulates your own personalized design ideas.